TETSUBarbell Lying Triceps Extension Skull Crusher vs Body-Up
The Barbell Lying Triceps Extension Skull Crusher and the Body-Up both train the triceps as their primary muscle. The Barbell Lying Triceps Extension Skull Crusher uses a barbell while the Body-Up is bodyweight-only. Here is how they compare and when to pick each.
Side-by-side comparison
| Barbell Lying Triceps Extension Skull Crusher | Body-Up | |
|---|---|---|
| Primary muscle | triceps | triceps |
| Body part | upper arms | upper arms |
| Supporting muscles | shoulders | chest and shoulders |
| Equipment | barbell | bodyweight |
| Steps in our guide | 5 | 5 |
How each one starts
Barbell Lying Triceps Extension Skull Crusher — first steps
- Lie flat on a bench with your feet flat on the ground and your head at the end of the bench.
- Hold the barbell with an overhand grip, hands shoulder-width apart, and extend your arms straight up over your chest.
Body-Up — first steps
- Start by placing your hands on a raised surface, such as a bench or parallel bars, with your palms facing down and fingers pointing forward.
- Extend your legs out in front of you, keeping your heels on the ground and your body straight.
Full step-by-step guides are linked below.
Which should you choose?
The Barbell Lying Triceps Extension Skull Crusher lets you load the heaviest weights and progress in small, steady jumps. The Body-Up needs no equipment and scales through leverage, tempo and reps. If your gym has both options, neither is a wrong choice: pick the one that feels strongest through a full range, and swap after 6 to 8 weeks to keep the triceps adapting.
Full form guides
Common questions
Is the Barbell Lying Triceps Extension Skull Crusher better than the Body-Up?
Neither is universally better — both train the triceps as the primary mover. The Barbell Lying Triceps Extension Skull Crusher lets you load the heaviest weights and progress in small, steady jumps, while the Body-Up needs no equipment and scales through leverage, tempo and reps. Choose based on your equipment and which movement you can progress consistently.
Can I do both the Barbell Lying Triceps Extension Skull Crusher and the Body-Up in the same program?
Yes, but usually not in the same session — they overlap heavily on the triceps. A common setup is one as your main movement and the other on a second training day, or alternating them block by block.
Do the Barbell Lying Triceps Extension Skull Crusher and the Body-Up work the same muscles?
The primary muscle is the same: the triceps. Supporting muscles differ slightly — shoulders for the Barbell Lying Triceps Extension Skull Crusher versus chest and shoulders for the Body-Up.
Track it in Tetsu
Tetsu tracks both movements separately, keeps your PRs per exercise, and tells you which one is actually progressing. Free to start.